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Finding the Fourth Proportional to 18,488.25, 27,705.65 and 7,955.42

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Solution

The fourth proportional to 18,488.25, 27,705.65 and 7,955.42 is: 11,921.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,488.25 : 27,705.65 = 7,955.42 : x
  2. Step 2: Convert to fraction form
    18,488.25/27,705.65 = 7,955.42/x
  3. Step 3: Cross multiply
    18,488.25x = 27,705.65 × 7,955.42
  4. Step 4: Simplify right side
    18,488.25x = 220,409,903.82
  5. Step 5: Solve for x
    x = 220,409,903.82/18,488.25
  6. Step 6: Final answer
    x = 11,921.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.